"Ready to put the flybridge on?"
Perhaps the next owner will need an oxygen tent,
Someone E mailed and asked why not a longer term plastic roof , Nadiacore or even Airex.
Certainly the necessary roof penetrations are easier and less risk,
BUT
On a boat that is basically a work boat , that may go on "forever" with Fire Retardant resin and full foam flotation (can't burn , can't be sunk) the likely hood is the boat will be rebuilt many times in the next few decades.
Lobster boat , PAX boat or house boat , I assume the PH may l be removed for the next service.
So the 20+ years of GRP covered laminated ply lifetime should take care of my use , and if the next guy does "My Way" with a Sawzall, not much investment will be lost.
A rough guess is $3K for a GRP roof , under a grand for this install.
I would use boat deck paint if I thought a dining room was going on the roof , the trailer paint is fantastic at reflecting the suns rays (insolation) , but slippery to walk on , esp. when wet.